throttle

If this filter is successful, add any arbitrary fields to this event. Field names can be dynamic and include parts of the event using the %{field}.

Example:

    filter {
      throttle {
        add_field => { "foo_%{somefield}" => "Hello world, from %{host}" }
      }
    }
[source,ruby]
     You can also add multiple fields at once:
    filter {
      throttle {
        add_field => {
          "foo_%{somefield}" => "Hello world, from %{host}"
          "new_field" => "new_static_value"
        }
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would add field foo_hello if it is present, with the value above and the %{host} piece replaced with that value from the event. The second example would also add a hardcoded field.

If this filter is successful, add arbitrary tags to the event. Tags can be dynamic and include parts of the event using the %{field} syntax.

Example:

    filter {
      throttle {
        add_tag => [ "foo_%{somefield}" ]
      }
    }
[source,ruby]
     You can also add multiple tags at once:
    filter {
      throttle {
        add_tag => [ "foo_%{somefield}", "taggedy_tag"]
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would add a tag foo_hello (and the second example would of course add a taggedy_tag tag).

Events greater than this count will be throttled. Setting this value to -1, the default, will cause no events to be throttled based on the upper bound.

Events less than this count will be throttled. Setting this value to -1, the default, will cause no events to be throttled based on the lower bound.

The key used to identify events. Events with the same key are grouped together. Field substitutions are allowed, so you can combine multiple fields.

The maximum age of a timeslot. Higher values allow better tracking of an asynchronous flow of events, but require more memory. As a rule of thumb you should set this value to at least twice the period. Or set this value to period + maximum time offset between unordered events with the same key. Values below the specified period give unexpected results if unordered events are processed simultaneously.

The maximum number of counters to store before decreasing the maximum age of a timeslot. Setting this value to -1 will prevent an upper bound with no constraint on the number of counters. This configuration value should only be used as a memory control mechanism and can cause early counter expiration if the value is reached. It is recommended to leave the default value and ensure that your key is selected such that it limits the number of counters required (i.e. don’t use UUID as the key).

The period in seconds after the first occurrence of an event until a new timeslot is created. This period is tracked per unique key and per timeslot. Field substitutions are allowed in this value. This allows you to specify that certain kinds of events throttle for a specific period of time.

The name to use in configuration files. The memory control mechanism automatically ajusts the maximum age of a timeslot based on the maximum number of counters. Call the filter flush method at regular interval. It is used by the memory control mechanism. Set to false if you like your VM to go (B)OOM.

If this filter is successful, remove arbitrary fields from this event. Fields names can be dynamic and include parts of the event using the %{field} Example:

    filter {
      throttle {
        remove_field => [ "foo_%{somefield}" ]
      }
    }
[source,ruby]
     You can also remove multiple fields at once:
    filter {
      throttle {
        remove_field => [ "foo_%{somefield}", "my_extraneous_field" ]
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would remove the field with name foo_hello if it is present. The second example would remove an additional, non-dynamic field.

If this filter is successful, remove arbitrary tags from the event. Tags can be dynamic and include parts of the event using the %{field} syntax.

Example:

    filter {
      throttle {
        remove_tag => [ "foo_%{somefield}" ]
      }
    }
[source,ruby]
     You can also remove multiple tags at once:
    filter {
      throttle {
        remove_tag => [ "foo_%{somefield}", "sad_unwanted_tag"]
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would remove the tag foo_hello if it is present. The second example would remove a sad, unwanted tag as well.